If you have read any of our previous posts on cyber-insurance readiness, you have seen us reference managed EDR as a baseline requirement for Canadian SMB cybersecurity in 2026. Cyber-insurance questionnaires ask about it. Every breach investigation we have been involved with in the past two years would have detected the intrusion materially earlier if managed EDR had been in place. The pricing is now within reach for businesses of any size.
But what is EDR, what does it actually do, and what should you ask the vendor selling it to you? This article is a plain-language explanation.
The short version
EDR — Endpoint Detection and Response — is a security tool that watches every program running on every computer in your business, looks for behaviour patterns that match malicious activity, and either blocks the activity automatically or alerts a security analyst within seconds. When that analyst is someone watching twenty-four hours a day, seven days a week, it is called managed EDR.
It is the modern replacement for antivirus, in the same sense that smartphones replaced flip phones. They both make calls. One does a lot more.
How EDR differs from antivirus
Traditional antivirus works by comparing files on your computer to a list of known-bad signatures. If a file matches a signature in the list, antivirus blocks it. This worked reasonably well in the era when malware was static and reused widely.
In 2026, attackers generate custom-tailored, polymorphic malware that does not match any signature list. They use legitimate-looking remote-access tools, abuse built-in Windows utilities (PowerShell, certutil, regsvr32), and chain together actions that are individually unremarkable but together constitute an attack. Antivirus is structurally unable to detect this.
EDR takes a different approach. Instead of asking is this file on the bad list?, EDR asks what is this process doing right now, and does its behaviour look like part of an attack? It watches sequences of actions — a process spawned by Excel, that contacts a server in Russia, then begins enumerating user accounts and encrypting files — and recognizes the pattern even if every individual file involved looks legitimate.
This is the same shift that happened in credit-card fraud detection a decade ago: from blocking specific stolen card numbers to recognizing unusual spending patterns. The shift away from signature-based defence is fundamental, and it is what makes EDR effective against modern threats in ways that antivirus cannot match.
What EDR actually does, in practical terms
A typical day on a managed EDR deployment looks like:
- Continuous monitoring of every process on every endpoint — typically tens of thousands of events per day per machine, summarized and analyzed in real time
- Automatic blocking of high-confidence threats (clearly malicious behaviour, known indicators of compromise)
- Alerting for medium-confidence behaviour (suspicious patterns that might be legitimate or might be early-stage attacks)
- Investigation of alerts by a security analyst, typically within minutes during business hours and within an hour overnight
- Containment if investigation confirms a threat — the affected endpoint is isolated from the network, the malicious process killed, persistence mechanisms removed
- Reporting to the business owner / IT contact when action was taken, what was found, and what the recommended follow-up is
The user of the affected endpoint usually doesn't notice anything happened. The attacker's access was cut off before they could escalate to ransomware deployment, lateral movement, or data exfiltration.
What EDR does NOT do
EDR is excellent at endpoint-level detection and response. It is not a complete cybersecurity strategy. Specifically:
- EDR does not patch software vulnerabilities. You still need patch management.
- EDR does not filter email. You still need Microsoft Defender for Office 365 or equivalent.
- EDR does not back up your data. Backups are a separate problem.
- EDR does not train your users. Phishing simulation and security awareness training are separate programs.
- EDR does not replace network firewalls. Edge protection is still important, particularly for businesses with on-premises servers.
- EDR has limited visibility into cloud workloads. SaaS apps and cloud services need their own monitoring.
A complete cybersecurity stack uses EDR as the endpoint pillar, along with email security, network security, identity management, backup, and awareness training. EDR is the foundation, not the whole house.
What to look for in an EDR product
For Canadian SMBs in 2026, the main considerations:
Managed vs. unmanaged. Unmanaged EDR is a tool you operate yourself. Managed EDR (sometimes called MDR — Managed Detection and Response) includes the 24/7 SOC analysts who actually investigate and respond to alerts. For SMBs, managed is almost always the right choice. Without a dedicated security team, the alerts will go uninvestigated.
Vendor SOC quality. The whole point of managed EDR is the human analyst watching the alerts. Ask about analyst-to-customer ratio, average response time, and where the SOC is located. We typically work with Huntress for SMBs (24/7 SOC, generous response SLAs, single per-endpoint pricing).
Pricing model. Per-endpoint per-month is the standard. For SMBs, $7–13 USD per endpoint per month is the realistic range for managed EDR with a strong SOC. Anything significantly cheaper suggests either a thin SOC or self-managed deployment. Anything significantly more is enterprise-grade and likely overkill.
Integration with your stack. EDR works better when integrated with your other tools — Microsoft Defender, M365 Conditional Access, your MSP's RMM, your ticketing system. Vendors that integrate well are worth a premium.
Detection effectiveness. Hard to assess as a buyer, but third-party testing by MITRE Engenuity ATT&CK Evaluations is the most credible source. Look at the latest evaluation results before signing.
How we deploy it
Peace Country Cyber includes managed EDR (Huntress) in every tier starting with Cyber Essentials ($95/seat/mo). Deployment is typically 1-2 days for a 30-seat business. We handle vendor licensing, agent deployment, console configuration, alerting integration, and ongoing analyst coverage.
If you currently have antivirus and are considering an upgrade to EDR, this is one of the conversations where the ROI math is straightforward: avoided incident costs typically dwarf annual licensing within 18 months, often within 6.
Peace Country Cyber is northern Alberta's local cybersecurity partner. Take the free Security Risk Report →